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S
HUAWEI TECHNOLOGIES CO., LTD.
What’s LTE
LTE Basic Principle Introduction
Name: Paul
Email:[email protected]
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Content
LTE Background
LTE Key Technologies
LTE Network Architecture
LTE Resource Overview
LTE Market Overview
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HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 3
Download speed
150M
LTE
What’s LTE ?
Download
speed
171.2Kbps
2G
Download speed
14.4Mbps
3G
2 day
43 minutes
4 minutes
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LTE Background Introduction
What is LTE?
LTE (Long Term Evolution) is known as the evolution of
radio access technology conducted by 3GPP.
The radio access network will evolve to E-UTRAN (Evolved
UMTS Terrestrial Radio Access Network), and the correlated
core network will evolved to SAE (System Architecture
Evolution).
What can LTE do?
Flexible bandwidth configuration: supporting 1.4MHz, 3MHz,
5MHz, 10Mhz, 15Mhz and 20MHz
Peak date rate (within 20MHz bandwidth): 150Mbps for downlink
and 50Mbps for uplink
Time delay:
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Procedure of LTE Standardization
3GPP started LTE project in December 2004.
The SI (Study Item) was planned to finish in June 2006 but has been delayed until September 2006. Finisresearch and output technical reports.
The WI (Work Item)/standard institution stage was started in September 2006. The first version was plann
September 2007 but has been delayed.
The first GA protocol version was released in the end of 2008. Protocol 36.xxx series are for LTE.
The protocol is still under consummating.
LTE Background Introduction
LTE WI stageLTE SI stageDelayed
2006
Mar2006
Jun
2006
Sep
2005
Dec
2006
Dec
2007
Dec
2008
Dec
2007
Jun
2008
Jun
2007
Mar
2007
Sep
2008
Mar
2008
Sep
2009
Mar
LTE eand im
LTE Rel8(Approval)
LTE SI
LTE WI
LTE Rel8(Spec finished)
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SAE Brief Introduction
SAE System Architecture Evolution)considers evolution for the whole system architecture, including:
Flat Functionality. Take out the RNC entity and part of the functions are arranged on e-NodeB in order to redu
enhance the schedule ability, such as interference coordination, internal load balance, etc.
Part of the functions are arranged on core network. To enhance the mobility management, all IP technology is
and control-plane are separated. The compatibility of other RAT is considered.
SGi
S4
S3 S1-MME
PCRF S7
S6a
HSS
O(
S10
UE
GERAN
UTRAN SGSN
“ LTE - Uu ” EUTRAN
MME
S11
S5 ServingSAE
Gateway
PDNSAE
GatewayS1-U
LTE Background Introduction
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LTE Background Introduction
SON Brief Introduction
SON (Self Organization Network) is the functions of LTE that required by the NGMN (Next Generation M
operators. From the point of view of the operator’s benefit and experiences, the early communication systems had b
compatibility and high cost. New requirements of LTE are brought forward, mainly focus on FCAPSI (Fau
Alarm, Performance, Security, Inventory) management:
Self-planning and Self-configuration, support plug and play
Self-Optimization and Self-healing
Self-Maintenance
Advantages of SON Reduce OPEX. Lower cost for operator in
planning, optimization and maintenance.
Vendor promote the sale of features and tools to
reduce the cost of network optimization after
deployment.
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Content
LTE Background
LTE Key Technologies
LTE Network Architecture
LTE Resource Overview
LTE Market Overview
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Radio Frame Structures Supported by LTE:
Type 1, applicable to FDD
Type 2, applicable to TDD
FDD Radio Frame Structure:
LTE applies OFDM technology, with subcarrier spacing f=15kHz and 2048-order IFFT.
The time unit in frame structure is Ts=1/(2048* 15000) second
FDD radio frame is 10ms shown as below, divided into 20 slots which are 0.5ms. One
slot consists of 7 consecutive OFDM Symbols under Normal CP configuration
#0 #1 #2 #3 #19#18
One radio frame, T f = 307200T s = 10 ms
One slot, T slot = 15360T s = 0.5 ms
One subframe FDD Radio Frame Structure
Concept of Resource Block:
LTE consists of time domain and frequency domain resources. The minimum unit for schedule is RB
(Resource Block), which compose of RE (Resource Element)
RE has 2-dimension structure: symbol of time domain and subcarrier of frequency domain
One RB consists of 1 slot and 12 consecutive subcarriers under Normal CP configuration
Radio Frame Structure (1)
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TDD Radio Frame Structure:
Applies OFDM, same subcarriers spacing and time unit
with FDD.
Similar frame structure with FDD. radio frame is 10ms
shown as below, divided into 20 slots which are 0.5ms.
The uplink-downlink configuration of 10ms frame are
shown in the right table.
One slot,
T slot=15360T s
GP UpPTSDwPTS
One radio frame, T f = 307200T s = 10 ms
One half-frame, 153600T s = 5 ms
30720T s
One subframe,
30720T s
GP UpPTSDwPTS
Subframe #2 Subframe #3 Subframe #4Subframe #0 Subframe #5 Subframe #7
Uplink-downlink Configurations
Uplink-downlink
configuration
Downlink-to-Uplink
Switch-point periodicity
0 1 2
0 5 ms D S U
1 5 ms D S U
2 5 ms D S U
3 10 ms D S U
4 10 ms D S U
5 10 ms D S U
6 5 ms D S U
DwPTS
GP: Gu
UpPTS:
TDD Radio Frame Structure
Radio Frame Structure (2)
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LTE Key Technologies- Overview
Sub-frame
Time
System Bandwid
Sub-carriers
Sub-frame
Frequency
Time
Time frequencyresource for User 1
Time frequencyresource for User 2
Time frequencyresource for User 3
System Bandwidth
MIMO
OFDMA
LTE
SC-FDMA
64QAM
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OFDM & OFDMA
OFDM (Orthogonal Frequency Division Multiplexing) is a
modulation multiplexing technology, divides the system
bandwidth into orthogonal subcarriers. CP is inserted
between the OFDM symbols to avoid the ISI. OFDMA is the multi-access technology related with OFDM, is
used in the LTE downlink. OFDMA is the combination of
TDMA and FDMA essentially.
Advantage: High spectrum utilization efficiency due to
orthogonal subcarriers need no protect bandwidth. Support
frequency link auto adaptation and scheduling. Easy to
combine with MIMO.
Disadvantage: Strict requirement of time-frequency domain
synchronization. High PAPR.
DFT-S-OFDM & SC-FDMA
DFT-S-OFDM (Discrete Fourie
OFDM) is the modulation mult
in the LTE uplink, which is sim
release the UE PA limitation caEach user is assigned part of t
SC-FDMA(Single Carrier Fre
Accessing)is the multi-acces
DFT-S-OFDM.
Advantage: High spectrum util
orthogonal user bandwidth nee
Low PAPR.
The subcarrier assignment sch
mode and Distributed mode.
OFDMA & SC-FDMA
TTI: 1ms
System Band
Sub-band 12Sub-carriers
Time
TTI: 1ms
System Band
Sub-band 12Sub-carriers
Time
Sub-carriers
TTI: 1ms
Frequency
Time
System Bandwidth
Sub-band 12Sub-carriers
User 1
User 2
User 3
Sub-carriers
TTI: 1ms
Frequency
Time
System Bandwidth
Sub-band 12Sub-carriers
User 1
User 2
User 3
User 1
User 2
User 3
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Downlink MIMO
MIMO is supported in LTE downlink to achieve spatial
multiplexing, including single user mode SU-MIMO and multi
user mode MU-MIMO.
In order to improve MIMO performance, pre-coding is used in
both SU-MIMO and MU-MIMO to control/reduce the
interference among spatial multiplexing data flows.
The spatial multiplexing data flows are scheduled to one
single user In SU-MIMO, to enhance the transmission rate
and spectrum efficiency. In MU-MIMO, the data flows are
scheduled to multi users and the resources are shared within
users. Multi user gain can be achieved by user scheduling in
the spatial domain.
Uplink MIMO
Due to UE cost and power consumpti
implement the UL multi transmission
Virtual-MIMO, in which multi single an
to transmit in the MIMO mode. Virtua
Scheduler assigns the same resource
transmits data by single antenna. Sys
the specific MIMO demodulation sche
MIMO gain and power gain (higher Tx
freq resource) can be achieved by Vi
the multi user data can be controlled
also bring multi user gain.
Pre-coding vectors
User k data
User 2 data
User 1 data
Channel Information
User1
User2
User k
Scheduler Pre-coder
S1
S2
Pre-coding vectors
User k data
User 2 data
User 1 data
Channel Information
User1
User2
User k
Scheduler Pre-coder
S1
S2
User 1 data
Channel
Scheduler
MIMO
Decoder User k data
User 1 data
User 1 data
Channel
Scheduler
MIMO
Decoder User k data
User 1 data
DL-MIMO Virtual-MI
MIMO
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LTE 4Rx:Coverage Gain 3dB Capacity Gain 6
2Rx
4Rx
UL 4Rx helps UL coverage by 60%50~100%
2Rx
4Rx
2Rx4Rx
Cell edge use
UL cell level t
UL user perfo
edge > cell m
No increase C
Stable KPIs
Gain
UL User
Tput
Field
Higher diversity andarray gains =>
maximize SINR
3dB
UL Cell Edge User Tput UL Cell Level Tput
LTE 4T DL C ll Ed U T t G i 36%
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LTE 4Tx:DL Cell Edge User Tput Gain 36%Cell Capacity Gain 20%!
~36% ~20%
2Tx2Tx
4Tx4Tx
DL MAC
Throughput
(Mbps)
RSRP=-119dBm
RSRP=-92dBm
Ave DL user T
4x2
4Tx
Array and diversity gains by using 4
antennas to transit 2 data streams
improvement36%
20%
Field Res
DL Cell Edge User Tput DL Cell Level Tput
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Description• Two component carriers (CC) can be aggr
wider transmission bandwidth for downlink,or non-contiguous .
CA Overview
Benefits•Improved throughput
•Improved spectrum flexibility: CA with carri
frequency bands
Dependency• 2 RRU to support inter-band CA
• Terminal support to get aggregated bandw
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CA : Testing Result for O Operator
0
500
Non-CA(BW 20M) CA(BW: 20M+20M)
U
e
T
M
b
BW:10M+20M. 2*2 MIMO
Lab Peak Rate Test
BW:20M+20M100
Field Peak Rate Test: 290([email protected][email protected]
Avg THP=290M
Avg PCC=146Mbps
Avg SCC=144Mbps
Chipset Vendor QCT Intel Hisilicon
DL CA(10M+10M)
2013Q2 2013Q4 2013Q3
DL CA(20M+20M)
2014Q2 2013Q4 2013Q3
Field Load Test: 290M([email protected]+20M@1.
0
500
Non-CA(BW 10M) CA(BW: 10M+20M)
U
e
T
M
b
BW:10M+20M. 2*2 MIMO
BW:10M+20M200
18 |
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Resource Grid in Time Frequency Domai
One downlink slot, Tslot
Resource element
OFDM symbolsDLsymb N OFDM symbolsDLsymb N
N s c
s u b c a r r i e r s
R B
Resource block
RBsc
DLsymb N N resource elements
N R B
D L
s u b c a r r i e r s
N s c R
B
One uplink slot, Tslot
0l Nl
N R B
U L
N R B
U L
s u b c a r r i e r s
N
s c R
B
SC-FDMA symbolsULsymb N
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Scalable Bandwidth Supported
Transmission
Bandwidth [RB]
Transmission Bandwidth Configuration [RB]
Channel Bandwidth [MHz]
Resourceblock
Channeledge
Channeledge
DC carrier (downlink only)Active Resource Blocks
Channel bandwidthBW
Channel [MHz]
1.4 3 5 10 15 20
Transmission bandwidthconfiguration N RB
6 15 25 50 75 100
Transmission bandwidth configuration NRB in E-UTRA channel bandw
Figure shows the relation between the Channel bandwidth (BWChannel)
Transmission bandwidth configuration (NRB).
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Achievable & Supported Peak Data Rates
Achievable LTE Peak Data RatesAccounts for overhead at different bandwidths& antenna configurations
DL UL
Bandwidth 2x2 4x4 1x2
5MHz 37Mbps 72Mbps 18Mbps
10MHz 73Mbps 147Mbps 38Mbps
20MHz 150Mbps 300Mbps 75Mbps
UE Cat. 1 2 3 4
DL 10 50 100 150
UL 5 25 50 50
UE Supported Peak Data RBased on FDD UE category in 3GPP s
Peak data rates scale with the bandwidth
2x2 MIMO supported for initial LTE deployments
Similar peak data rates defin
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LTE Downlink Speed Calculate,20MHz,2x2 MIMO
Peak Rate=[100*12*14*(1-9.5%-0.2%-12%-0.17%-0.2%-1.375
=154.33Mbps100: 100RB,20MHz
12:12 Subcarriers, One RB has 12 Subcarriers
14:14 OFDM Symbols, One Subframe has 14OFDM symbols
9.5%:RS Overload
0.2%:P-SCH,S-SCH Overload
12%:PDCCH Overload0.17%:PCFICH and PHICH Overload
0.2%:PBCH and PDSCH Overload
1.375%:PDSCH Overload
6: 64QAM, RE has 6 bits
2:2x2MIMO
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LTE Uplink Speed Calculate,20MHz
Peak Rate=[96*12*2*7(1-1/7-1/14)*4]/1ms
=50.69Mbps96: 96RB,20MHz,PUSCH available 96RB,
12:12 Subcarriers, One RB has 12 Subcarriers
2 and 7:2 slot, one slot has 7 symbols(Normal CP)
1/7:RS Overload expense
1/14:SRS Overload expense
4: 16QAM, RE has 4 bits
T i i B d idth C l l ti
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Transmission Bandwidth Calculation
Scenarios Dens Urban Urban Suburban Rural
Trans. Bandwidth(20MHz, S111) 170Mbps 145Mbps 102Mbps 93Mbps
Results:
Bandwidth= (S1 User Plane Data Flow+S1 Control Plane+X2 Data Flow)*Scenario Burst Coefficie
=(S1 User Plane Data Flow+S1 User Plane Data*2%+S1 User Plane Data*3%)*Scenario
=S1 User Plane Data Flow*(1+5%)*Scenario Burst Coefficient/89.5%
Calculation Functions:
Bandwidth Scenarios DL Mbps) UL Mbps)
2T2R(20MHz) Dense Urban, Urban 34.3 19.8
2T2R(20MHz) Suburban, Rural 26.3 14.0
Cell Average Throughput:
Scenario Dense
Urban
Ur
coefficient 1.4 1.
Scenario Burst Coeffi
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Content
LTE Background LTE Key Technologies
LTE Network Architecture
LTE Resource Overview
LTE Market Overview
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LTE Network Architecture
Main Network Element of LTE
The E-UTRAN consists of e-NodeBs, providing the user
plane and control plane.
The EPC consists of MME, S-GW and P-GW.
eNB
MME / S-GW MME / S-GW
eNB
eNB
S 1
S 1
S 1
S 1
X2
X 2X 2
E-UTRAN
internet
eNB
RB Control
Connection Mobility Cont.
eNB Measurement
Configuration & Provision
Dynamic Resource
Allocation (Scheduler)
PDCP
PHY
MME
S-GW
S1
MAC
Inter Cell RRM
Radio Admission Control
RLC
E-UTRAN EPC
RRC
Mobility
Anchoring
EPS Bearer Control
Idle State Mobility
Handling
NAS Security
P-GW
UE IP address
allocation
Packet Filtering
RRC: Radi
PDCP: Pack
RLC: Rad
MAC: Med
PHY: Phy
EPC: Evo
MME: Mob
S-GW: Serv
P-GW: PDN
Compare with traditional 3G network, LT
becomes much more simple and flat, wh
lower networking cost, higher networkin
shorter time delay of user data and contr
Network Interface of LTE
The e-NodeBs are interconnected with each other by means of the X2 interface, which enabling direct tra
data and signaling.
S1 is the interface between e-NodeBs and the EPC, more specifically to the MME via the S1-MME and t
the S1-U
LTE N k El F i
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eNB
RB Control
Connection Mobility Cont.
eNB Measurement
Configuration & Provision
Dynamic Resource
Allocation (Scheduler)
PDCP
PHY
MME
S-GW
S1
MAC
Inter Cell RRM
Radio Admission Control
RLC
E-UTRAN
RRC
Mobility
Anchoring
EPS Bearer Co
Idle State MobHandling
NAS Securi
e-Node functionalities:
RRM: RB control, admission control, connection mobility
control, scheduling; IP header compression and encryption of user data
stream; Selection of an MME at UE attachment;
Routing of User Plane data towards Serving Gateway;
Schedule the paging and broadcast messages from
MME;
Measurement and measurement reporting configuration
for mobility and scheduling;
MME functionalities:
NAS signaling and security;
AS Security control;
Idle state mobility handling; EPS (Evolved Packet System) bearer control;
Support paging, handover, roaming and authentication. S-GW functionalities:
Packet routing and forwarding; Lo
point for handover; Lawful intercep
charging per UE, PDN, and QCI; A
and QCI granularity for inter-opera
P-GW functionalities:
Per-user based packet filtering; UE IP address allocation;
UL and DL service level charging, gating and rate enforcement;
LTE Network Element Function
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Introduction of LTE Radio Protocol Stack
Two Planes in LTE Radio Protocol:
User-plane: For user data transfer
Control-plane: For system signaling transfer
Main Functions of User-plane:
Header Compression
Ciphering
Scheduling
ARQ/HARQ
eNB
PHY
UE
PHY
MAC
RLC
MAC
PDCPPDCP
RLC
eNB
PHY
UE
PHY
MAC
RLC
MAC
RLC
NAS
RRC RRC
PDCP PDCP
Main Functions of Control-plane:
RLC and MAC layers perform the sa
user plane
PDCP layer performs ciphering and
RRC layer performs broadcast, pagi
management, RB control, mobility fu
reporting and control
NAS layer performs EPS bearer man
security control
User-plane protocol stack
Control-plane protocol stack
Comparison of UTRAN & E UTRAN Network Archite
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Comparison of UTRAN & E-UTRAN Network Archite
eNB
MME / S-GW MME
eNB
S 1
S 1
S 1
X2
X 2X 2
The main difference between UMTS and LTE: the removing of RNC network element a
introduction of X2 interface, which make the network more simple and flat, leading lowe
cost, higher networking flexibility and low latency
UTRAN
LTE Interworking With 2G/3G Networks
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LTE Interworking With 2G/3G Networks
LTE-UE
Evolved UTRAN (E-UTRAN)
Evolved P
MME
S6a
Serving
Gateway
S1-U
S11
S1-MME
PDN
Gateway
PCRF
S7
SGiS5/S8
HSS
SGSN
S3UTRAN
Iu-PS
S4
Evolved
Node B
(eNB)
cell
LTE-Uu
GERANGb
Gr
GGSNGn Gi
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Content
LTE Background LTE Key Technologies
LTE Network Architecture
LTE Resource Overview LTE Market Overview
LTE Resource Capacity Assessment System
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eNodeB
eNodeB
LTE Resource Capacity Assessment SystemCAir InterfaceTerminal
Ethernet
MPT CPU
Utility
BBP CPU
Utility
Ethernet
Utility
RRC
Connected Usr
PRB Utility
Spectrum
Efficiency
Flow License
Utility
Sub. License
Utility
User Plane
PRACH Utility
PDCCH Utility
PUCCH Utility
SRS Utility
Paging Utility
Control Plane
eNodeB Transmission
Equipment Transmission
Avg. Sub. DL
Throughput
Avg. DL
Throughput
License
LTE Resource Capacity Assessment
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LTE Resource Capacity Assessment
Item Description Scenario nalysis
RRC License
Utility
RRC License Utility
If network User grow very fast, cell reach th
of initial RRC license, suggest expansion ne
connected user license.
PRB Utility PRB Utility RatioIf the cell with high PRB Utility Ratio, sugges
parameters related or adding new site.
ThroughputCell traffic mean
throughput
If network throughput grow very fast, reac
limitation of initial throughput license, sugg
expansion network throughput license.
PDCCH UtilityPDCCH Utility
Ratio
If cell with high PDCCH utility ratio, due to
high traffic load, suggest improving co
adding new site.
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Content
LTE Background LTE Key Technologies
LTE Network Architecture
LTE Resource Overview LTE Market Overview
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• GSA: 360 commercial LTE networks launched in 124 countries
• Huawei acquired 320+ LTE Contracts with 154 Commercial Launched Networks by S
• Huawei won 140+ LTE contracts in capital cities.
• Huawei deployed LTE in 9 of 10 Global Financial Central Cities
360 LTE networks are commerciallylaunched in 124 countries (up to Jan. 2015)
GSA: 360 commercial LTE network launched by Jan 20
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450
265
146
46
16
2
300
2015
(forecast )
20132012201120102009 2014H1
GSA forecasts 450 commercial
LTE networks by end 2015
GSA: 360 commercial LTE network launched by Jan. 20
Source: GSA Evolution to LT
360
2014Q4
312FDD Only
87% launched FDD m
8% launched TDD mo
5% launched FDD &T
360 total launched
# of Global LTE Commercial Networks in Bands
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# of Global LTE Commercial Networks in Bands
360 LTE Commercial Networks Launched on All Spectrum
Source: GSA Evolution to LTE report and Huawe
Different bands m ay ap
Each network may have several spectrums, t
7
850MHz
8
APT 700MHz
10
2.1GHz
1.9GHz
12
AWS
36
US.
700MHz
55
DD800
68
2.6GHz
FDD91
1.8GHz158
3.5 GHz(B4
9
2.3GHz
21
1
450 MHz
10
900MHz
GSA Status o f LTE Ecosystem Camera, 2Femtocell,
133Mobile
20
USB Modem
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0
100
200
300
400
500
600
700
800
900
1000
1800b3
1900b2
1900b25
2100b1
2600b7
700b12
700b13
700b14
700b17
700b28
800b20
850b5
900b8
AWSb4
TDD1900b39
TDD2300b40
TDD2600b38
T2b
Source: GSA Status of the LTE Ecosystem report
(up to 10.2014)
GSA
Status o f LTE Ecosystem
LTE user device: 2218 (including 1045 Smartphone)
133 20
Phone,
1045
Router,559
USB Modem,191
Current status o f LTE netwo rks (over 1 Mil l ion subs cribers)
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58.8[09-2014] 9.9
16.6[09-2014]
5.8[09-2014]
8.1
9[09-2014]
1[09
~75% coverage
(Q3-2012)
38.
5[09-2014]
[09-2014]
8.9[09-2014]
1.4[09-2014]
LTE Total: 280+ Million
Rogers
5.2
9[09-2014]
DTT-Moblie US
2.5[09-2014]
Source: GSA Evolution to LTE re
31.6[09-2014]
2.3[09-2014]
Vodafone
Germany
5.6[09-2014]
EE
http://www.telecomskorea.com/wp-content/uploads/2010/05/lgt_uplus.jpg
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174
153
82
41
28
10
HW Ericsson NSN ALU ZTE SS
Huawei Leading Global LTE Markets
1063
SS ALU
8
LTE Commercial
Networks
LTE TDD Commercia
Networks
EricssZTE
Source: GSA Evolution to LTE report and Huawei Wireless M
Huawei LTE in Six Continents
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Huawei LTE in Six Continents
32
Con
17Com
Netw
14LTE
CapUK
Singapore
Sweden
Korea
PhilippinesNorway
Germany
Brazil Austria
Saudi Arabia
Kuwait
Canada
New Zealand
Bahrain
India
Colombia
Russia
FinlandCzech
Republic Denmark Hong Kong
South Africa UAE
Japan MexicoMalaysia
Australia
ThailandSpain
Netherlands
Huawei dominates global FDD2600 and 1800 netw
http://www.google.com.hk/url?sa=i&rct=j&q=%E4%BF%84%E7%BD%97%E6%96%AF&source=images&cd=&cad=rja&docid=pK9jsB91bIe17M&tbnid=lnXqT77Huc56MM:&ved=0CAUQjRw&url=http://www.novasgroup.com.cn/country.aspx?countryId=6&ei=KNBWUaqUC8eckQXK64DACQ&psig=AFQjCNG2XaQX3cIXU9B-YVmcMOsk_9lXUA&ust=1364730275775633http://www.google.com.hk/url?sa=i&rct=j&q=%E4%BF%84%E7%BD%97%E6%96%AF&source=images&cd=&cad=rja&docid=pK9jsB91bIe17M&tbnid=lnXqT77Huc56MM:&ved=0CAUQjRw&url=http://www.novasgroup.com.cn/country.aspx?countryId=6&ei=KNBWUaqUC8eckQXK64DACQ&psig=AFQjCNG2XaQX3cIXU9B-YVmcMOsk_9lXUA&ust=1364730275775633
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HUAWEI TECHNOLOGIES CO., LTD.
4 7 1027
2514
4563
88
158 LTE 1800 commercial networks launched 91 LTE 2600 FDD commercial
(Jan. 2015)
EricsNSN
ZTE
HuaweiEricsson
NSNZTE SS ALU
ALU SS
893 LTE 2600 FDD device944 LTE 1800 devices were announced
Source: GSA Evolution to LTE report and Huawei Wireless MI
(up to Jan. 2015)
Source: GSA S
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HUAWEI TECHNOLOGIES CO., LTD.
Thank you